That's interesting, of course similar to the top and second ring relationship.
I can see that if you are venting the second ring to make sure it doesn't flutter the first, you pay as well go one step deeper on the piston and dump in into the piston so it doesn't flutter the second.
However, I am very skeptical of it carrying more RPM because of that, especially 800 rpm. I don't have anything without pistons in it, but may try it on a FAST build I have coming up.